Question: What polychoron starts with the letter "u"?
Paraphrase: What polychoron does the letter "u" start with?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q2155148 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'u')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: uniform antiprismatic prism, uniform antiprismatic prism